JPS5394809A - Lead switch control system - Google Patents

Lead switch control system

Info

Publication number
JPS5394809A
JPS5394809A JP1009477A JP1009477A JPS5394809A JP S5394809 A JPS5394809 A JP S5394809A JP 1009477 A JP1009477 A JP 1009477A JP 1009477 A JP1009477 A JP 1009477A JP S5394809 A JPS5394809 A JP S5394809A
Authority
JP
Japan
Prior art keywords
control system
switch control
lead switch
lead
trunk
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1009477A
Other languages
Japanese (ja)
Inventor
Masahiro Takahara
Kiyokazu Murai
Masaharu Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP1009477A priority Critical patent/JPS5394809A/en
Publication of JPS5394809A publication Critical patent/JPS5394809A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Abstract

PURPOSE:To confirm the open state of the off-normal contact within the trunk through the control circuit and thus to increase the reliability for the lead switch control system.
JP1009477A 1977-01-31 1977-01-31 Lead switch control system Pending JPS5394809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1009477A JPS5394809A (en) 1977-01-31 1977-01-31 Lead switch control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1009477A JPS5394809A (en) 1977-01-31 1977-01-31 Lead switch control system

Publications (1)

Publication Number Publication Date
JPS5394809A true JPS5394809A (en) 1978-08-19

Family

ID=11740735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1009477A Pending JPS5394809A (en) 1977-01-31 1977-01-31 Lead switch control system

Country Status (1)

Country Link
JP (1) JPS5394809A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039672U (en) * 1983-08-26 1985-03-19 河田商事株式会社 Heat insulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039672U (en) * 1983-08-26 1985-03-19 河田商事株式会社 Heat insulator

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